Enron AOL, keiretsu study [53] [54] plan. ^ • • Tirole, Jean ISBN 3-11-015765-9 London and New York: Routledge, ISBN 0-415-32308-8 London and New York: Routledge, ISBN 0-415-32910-8 London and New York: Routledge, ISBN 0-415-32309-6 London and New York: Routledge, ISBN 978-0-415-40533-1 London and Thousand Oaks, CA: SAGE, ISBN 978-1-4129-2899-1 London and Thousand Oaks, CA: SAGE, ISBN 978-1-4129-3589-0